Abstract: Disclosed herein is a threaded bottom bracket comprising: an internal sleeve, a ball bearing, wherein an inner race of the ball bearing is an extended inner race, a cup fit to concentrically hold the ball bearing, wherein the cup is coupled to the internal sleeve, a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, wherein the labyrinth and the cup form a path, and a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the extended inner race.

Abstract: A handlebar with directional performance characteristics is disclosed. The handlebar includes a stem clamp region, a plurality of control end regions, and a plurality of transition regions. A cross-section of at least a portion of one or more of the plurality of transition regions includes an asymmetric cross-section based on an intersection of plurality of ellipses and defined by four different radii R1, R2, R3, R4 and an angle (?) of an axis of symmetry of said ellipses, wherein said plurality of ellipses have coincident centers.

Abstract: Disclosed herein is a threaded bottom bracket comprising: an internal sleeve, a ball bearing, wherein an inner race of the ball bearing is an extended inner race, a cup fit to concentrically hold the ball bearing, wherein the cup is coupled to the internal sleeve, a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, wherein the labyrinth and the cup form a path, and a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the extended inner race.

Abstract: A handlebar with directional performance characteristics is disclosed. The handlebar includes a stem clamp region, a plurality of control end regions, and a plurality of transition regions. A cross-section of at least a portion of one or more of the plurality of transition regions includes an asymmetric cross-section based on an intersection of plurality of ellipses and defined by four different radii R1, R2, R3, R4 and an angle (?) of an axis of symmetry of said ellipses, wherein said plurality of ellipses have coincident centers.

Abstract: One aspect of this disclosure is a climbing skin attachment apparatus. The apparatus may comprise a climbing skin attachment portion and a snow device connection portion, a channel extending at least partially through the climbing skin attachment portion along a channel axis to receive an anchor portion of a climbing skin, and a passage extending through the climbing skin attachment portion and into the channel along the channel axis to receive a lead portion of the climbing skin. Related apparatus, methods, and systems also are described.